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Created April 3, 2026 16:13
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regression-dog skill
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SKILL.md
name regression-dog
description Review code changes for regressions.

Review code changes for behavioral differences between the before and after code.

Important:

  • Do NOT run tests, typechecks, linters, or build commands. CI already handles those. Focus your context budget entirely on reasoning about the code changes and its implications on logic/behavior/data/etc.
  • Enumerate behavioral differences: "this used to do X, now it does Y." Do not judge whether the old or new behavior is correct — just surface the delta. Do not flag pre-existing issues or suggest improvements.

Output format:

  • List regressions first, numbered, with severity.
  • After the regressions section, add a "Cleared" section listing items that were reviewed and found to have no issues. Prefix each cleared item with a ✅ emoji.

Scope (pass as arguments):

  • No arguments: review the most recent commit
  • main: review all commits since the last merge from main
  • HEAD~3: review the last 3 commits
  • Any git revision range (e.g., abc123..HEAD, main..HEAD)
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